Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in this Registration Statement on Form S-8 of Limbach Holdings, Inc. of our report dated March 8, 2023relating to the consolidated financial statements appearing in the Annual Report on Form 10-K of Limbach Holdings, Inc. for the year ended December 31, 2022.

                            /s/ Crowe LLP

    Crowe LLP

Atlanta, Georgia

March 8, 2023